The World’s Tallest Water Sphere in Union, New Jersey. Apparently a tower in Edmond, Oklahoma is taller and holds more water, but technically that design is a water spheroid. Union’s Water Sphere is still the tallest true water sphere. More facts about the tower at Dan Becker’s fan site. Update: I know you were all dying to see the world’s largest water spheroid, so here it is! 😉 Thanks: Jay Soffian & B.Dalton